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Atomic no.:
Atom. weight: 238
Density: 19.05
Heavy metal
Melting point: 1132°C
Boiling point: 3818°C
Colour: Array
Discoverer: M.H. Klaproth
Place: Berlin, Germany
Year: 1789

Uranium was discovered in 1789 by M.H. Klaproth in Berlin, Germany. Although uranium is the longest known member of the actinide group of metals, it attracted scant attention until the discovery of uranium fission in 1939. It is now of vital importance as a nuclear fuel. Uranium occurs naturally as two main isotopes, 238U (99.3%) and 235U (0.7%), along with a trace of a third isotope, 233U. Separation of the isotopes is achieved by conversion to the hexafluorides. The 235U isotope is the more important as this reacts with a neutron by fission to form lighter nuclei, the reaction being accompanied by the release of a considerable amount of energy and more neutrons which, in turn, fission more 235U and permits the build up of a chain reaction. The energy released as a result of this nuclear process is the order of a million times greater than that resulting from burning fossil fuel and it is for this reason that there is substantial interest in nuclear fission. 238U is also important in a nuclear reactor as it can absorb neutrons itself to produce heavier elements, the most important of which is plutonium, another nuclear fuel. Under the correct conditions, more plutonium can be produced from 238U than the amount of 235U consumed, and such an arrangement is found in a "breeder" type of nuclear reactor.

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 Acrylic Element cube - Uranium - 50mm  Art. Nr. 003695  
Acrylic Element cube - Uranium - 50mm
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The Sensation! Acrylic Element-blocks NEW!

Uranium - placeholder - Radioactive symbol ONLY - Does not contain any Uran!

The innovation! Selected element samples in amply amount embedded in 50x50x50mm first-class crystal clear acrylic (not cheap resin!) . Totally lightfast, high gloss polish. The text is embedded inside! Hand crafted! Made in the European Union! Each acrylic block is a unique and individual piece! EXTREMELY eye-catching!

These original acrylic cubes are used in many important and famous periodic table collections allover the world!

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